Parts of the urinary system remove liquid waste from the blood. Do you know which system removes gaseous waste (carbon dioxide) from the blood?

• Digestive
  
• Respiratory
  
• Nervous
  
• Circulatory

Test your knowledge of human organ systems. Take the Organ Systems Quiz.

To learn more about the organs of the body before taking the quiz, visit:

• Organ Systems
  
• Tissues